The Overengineering Department clock mark The Overengineering Department
Open Sauce 2026
01 / Nixie Tube Clock

NT—4000

Fig. 01 — Forest Green, front 1 / 6
03 / Favorite finishLive

Which one would you pick?

Pick one · results show after you vote
04 / ConsensusLive

Do you think our clock is dope?

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People think this is dope
05 / Register
We don’t currently have plans to make more.

But if you’d be interested in the plans, or in buying a kit or finished clock, add your email below. We won’t spam you.

06 / Open Sauce

Engineering confessions

07 / Cost

How much did this cost us?

$
08 / Primer

What is a Nixie?

Four ZM1000 Nixie tubes with the numerals 8554 lit
Fig. 07 — ZM1000 ×4, cathodes “8554” firedActual glow

Ten separate metal numerals stacked behind a mesh anode. High voltage on one cathode creates a glow discharge in the surrounding gas. The numeral is not projected or segmented — it is the electrode. The NT-4000 runs ZM1000s.